The Search for Raoul Wallenberg, the Missing Holocaust Hero, Tore His Family Apart

For six decades, his parents and siblings battled Moscow and their native Stockholm, mounting a search for answers that cost them their savings, careers, relationships, health and, concealed until now, two of their lives.

Also unknown, even to the Swedish foreign ministry -- whose file on Mr. Wallenberg dwarfs its record of any king, colony or war -- is that the family documented its struggle. Mr. Wallenberg's late mother and stepfather, who died two days apart in 1979, kept a diary. His half-brother, Guy von Dardel, now 89, compiled a 50,000-page archive.

Together with hundreds of interviews, the family's thousands of journal entries, letters and documents -- most read for the first time by The Wall Street Journal -- lay bare the toll of an unending quest.